Huh, only "based on the content length"? As if the contents don't matter, I thought this would be some interesting work that made a good size estimate in 2ms based on contents so you don't have to spend seconds or minutes compressing large files to see which compression method works best for this content.

Why, then, not just let me enter a file size that I'm curious about, if that's the only input it uses? Heck, why not just show a result graph with size on the X axis so you don't need to enter anything at all but just get the info the tool has to offer at a glance?